Energy Broadening Model for BGO Array Crystal from 0.059 to 1.332 MeV

Comparison of the X-ray tube spectrum measurement using BGO, NaI, LYSO, and HPGe detectors in a preclinical mini-CT scanner: Monte Carlo simulation and practical experiment

“…This parameter defines the capability of the detector to distinguish the different energy peaks in a multi-energy photon beam. In general, the energy resolution is commonly determined/affected by the factors such as; 1) fluctuation in the light generation for the same mono-energy irradiation, 2) the non-proportionality of light response, 3) statistical fluctuation in charge collection in the anode of the photomultiplier tube and 4) electronics noise [7,8,9]. In Monte Carlo simulation (particularly MCNP platform), Gaussian energy broadening (GEB) is a special order for tallies to better simulate a radiation detector whose energy peaks exhibit Gaussian energy broadening.…”

“…In this regard, an energy broadening model for Bismuth germanium oxide (BGO) detector was developed by Askari et al [8] wherein the GEB parameters for a 10 × 10 BGO array were calculated for the task of spectral response analysis in the presence of the wide energy range of gamma-rays in a simulation setting.…”

“…Since the GEB parameters and detector energy resolution are the determining factors for accurate modeling of the detector response, the precise estimation of these parameters is the key for reliable evaluation of these detectors [11,14,15]. There have been always interests in designing detectors with the highest possible sensitivity (to detect very low activity concentration) and high spatial resolution (to localize the spatial distribution of the activity concentration).…”

“…In this study, the Monte Carlo simulation was employed to evaluate the response of the different detectors wherein the same simulation settings such as positioning, distances, and sources were utilized. Gaussian Energy Broadening (GEB) of all radiation detectors according to Table 3, were incorporated in the MC simulation [6,8,11,13,42]. The detector efficiency was determined using F8 tally, which is specific for pulse height analysis without any variance reduction.…”

“…The energy cutoff was set to 0.5 and 0.01 MeV for electrons and photons, respectively. The number of histories in each MC simulation was equal to 5×10 8 . Figure 3 illustrates the schematic sketch of the simulated HPGe detector.…”